Heterogeneous nuclear ribonucleoprotein (hnRNP) H is a member of hnRNP H/F protein subfamily of hnRNPs that regulate the maturation and post-transcriptional processing of pre-mRNA. As a component of an mRNA export complex, hnRNP H shuttles mature mRNA from the nucleus to the cytoplasm. Although hnRNP H is primarily a nuclear protein, it can accumulate in the cytoplasm in certain tissues and cell types; however, the physiological relevance of hnRNP H cytoplasmic accumulation is unknown.
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